Gravure printing prepress design, plate making process characteristics
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There is a big difference between gravure packaging prepress plate making and plain printing, silk screen printing and other forms. Today, computer aided design and production have become popular. It is very important for graphic designers to master the prepress technology before carrying out gravure packaging design. , will seriously affect the normal design and production work and print quality.
The following sub-items analyze the characteristics of the prepress design and plate making process of gravure packages:
1. Standard document settings.
The packaging layout should be set according to the process specification of the standard document. The contents of the standard documents include basic elements such as document specifications, bleeding positions, cutting lines, overprint lines, color labels, etc. The layout specifications must meet the requirements for the packaged product specifications, plate making methods, substrate or opening specifications, and post-processing, and Set up according to the process specification, in order to facilitate the electronic imposition, printing, post-processing and quality inspection procedures, in order to better improve efficiency, save resources, reduce costs, improve quality.
2. The color process.
Gravure printing is done between different color blocks on the layout. What is the color press color press is to ensure that the printing overprint is accurate, or that the running version caused by the offset error does not occur within the range of relatively small misprints, but between two contact spot colors or two Colors that do not contain the same ingredients are set to overlap each other. The overlapping part of the data section has relevant process regulations. For example: light dark color pressure, light color penetration into the dark, dark original unchanged, even if the expansion of larger data is no harm, generally can be in the 0.3 ~ 0.5mm; dark dark color pressure or Light-colored light-colored colors will infiltrate each other. The expanded data is usually about 0.2mm; there are some complicated situations, such as: the design of the elements containing the outer contours of the characters and the processing of the adjacent colors, priority should be given to the silhouette of the person's 9l To determine the expansion, etc. In general, the basic principle is to determine the process application depending on the color and design elements of the specific layout. Different printing substrates also have different data on the color process.
3. Word processing technology.
The printing quality of the text part directly affects the accuracy and efficiency of the expression and transmission of information]. Gravure packaging design word processing, there are strict technical knowledge. Such as: text size control, font settings. When the text is too small, it is easy to become lumpy. There are differences in the thickness of the horizontal and vertical strokes in different fonts. The strokes are too fine to be easily broken or completely lost during electronic engraving, resulting in incomplete or incomplete printing. The small text and captions should not use multi-color blending and try to use a single color. The reason is that multi-color overprinting during the offset printing can easily lead to runaway and seriously affect the quality of the printed matter; dark colors are not suitable for dark colors. Text and light-colored backgrounds are not suitable for light-colored texts; in the case of computer-aided design drafts, texts on layouts generally have to be converted (or called a curve or rasterization), because of different corporate institutions (design, Platemaking and Printing) In the same business process, various stages may not correctly display the required textual content due to differences in fonts or lack of necessary fonts, and garbled characters may affect the work process. Text is one of the basic elements of layout layout. The knowledge of the process of using and processing the text is very important for each design and plate-making personnel.
4. Color and net into the use of technology.
The color printed on the plastic film is the first visual element of the package, and the customer's sense of the product is color first, and the color reproduction effect is good, which will easily stimulate the reader's vision and arouse the reader's desire to buy. The setting of the deep and shallow nets of the color flat screen should take into account the loss of color during gravure plate making. In the process of hanging nets, shallow nets are easily lost during plate making, and are not easily controlled during printing. Gradient nets are handled with transitions, paying attention to the transitional nature. Don't take steps, don't be too steep, and transitions should be natural and soft; The length, color depth, and gradation direction all have a certain quality impact on the platemaking and printing.
5. Bar code process.
The commodity bar code refers to the bar code used for the product identification, and more specifically, it is a module combination code used to mark the international general commodity code. Barcodes are typically sourced from computer software or barcode barcodes that are computer-aided or manually assembled into the design layout. Bar code like text-like to pay attention to the color and thickness of the line processing, scaling and placement direction (in relation to the printing direction) are also specified, product bar code magnification factor is 0.80 to 2.00, the bar code symbol with the magnification factor changes to enlarge Or zoom out. Barcode reading is achieved by recognizing the boundary and width of the bar. Therefore, the greater the contrast between the bar and the empty bar, the better the red color cannot be used. Gold cannot be used as a bar and cannot be empty.] Improper handling of barcodes can result in the packaging products not being able to detect the equipment in the market and unable to read the information of the products.